**Video & slides coming soon**

This presentation is based on Horizon Europe Project Demo-BLog where the business needs where pre-defined, and the challenges focused on defining requirements at an abstract opportunity/problem space domain level for an automated renovation advice tool.

To accomplish this task, a System Definition process was undertaken to achieve the Engineering solution space domain. And to achieve the System Definition methodology the author decided to focus on first creating an Interface Control Document that consisted of high-level overview architecture of the target system CLEA (Digital Building Logbook) and the source system BDNB (Base de Données Nationale des Bâtiments).

However, the alternative architectures presented challenges such as how to validate the requirements at this stage. The chosen tool/technique was THALES (Model-Based System Engineering) – Capella Tool and Arcadia Methodology. The article presents this approach, which included: operational analysis, system needs analysis, logical architecture and discussions reflecting the physical architecture relating to the requirement phases of need understanding and solution architecture design.

The outcome of this presentation is The French Demonstration Preliminary Requirements and acknowledgement to the benefits of MBSE: Improved communications, Increased ability to manage system complexity, Improved product quality, Reduced Recycled Time, Reduced Risk, Enhanced knowledge capture and reuse of the information.